While Americans will be able to download the software in the mid/late morning, people in Europe, Asia, and Oceania will have to wait until later in their respective days. Some places will even have to wait until the early hours of Wednesday.

Why? Because of time zones. Apple will take the global covers off its new operating system at 10:00am in San Francisco (Pacific Time).

So, what does that mean for you? Here’s a list of the local times of when some of the biggest cities in the world will get their hands of the new software.

Where Do You Live?

San Francisco, USA: 10:00 am

Mexico City, Mexico: 12:00 pm

New York, USA: 1:00 pm

Toronto, Canada: 1:00pm

London, United Kingdom: 6:00 pm

Paris, France: 7:00 pm

Berlin, Germany: 7:00 pm

Moscow, Russia: 8:00pm

New Delhi, India: 10:30 pm

Beijing, China: Wednesday, 1:00 am

Perth, Australia: Wednesday, 1:00 am

Tokyo, Japan: Wednesday, 2:00 am

Sydney, Australia: Wednesday, 3:00 am

Of course, in real terms, everyone will get the update at the same time. And while most Australians will probably wait until Wednesday morning before trying to upgrade, millions of people in the United States, Europe, and the Middle East will be logging onto Apple’s servers at the same time.

As such, there’s going to be a massive strain on the company’s bandwidth. If you’re not absolutely desperate for the upgrade, it might be sensible to wait a few hours before pressing Update. You’ll be able to enjoy a faster, smoother, and less troublesome upgrade experience.

Dan is a British expat living in Mexico. He is currently the Social Editor for MakeUseOf. He was formerly the Creative Editor and Finance Editor. Prior to his writing career, he was a Financial Consultant. He holds various certifications from the University of Leeds, the University of Cambridge, and the…